Electrical welding process



1,538,590 J. T. r. RANDLES ELECTRI CAL WELDING PROCES S Filed Jan. 14 i925 Amih ' ATIORNEY Patented May 19, 1925.

UNITED STATES PATENT OFFICE.

JOHN THOMAS TURKEY MNDLES, F BIRMINGHAM, ENGLAND, ASSIGNOE TO DUN- LOP RUBBER COKPAHY LIMITED, OF BIRMINGHAM, ENGLAND.

nmo'rmoiir. WELDING rnoonss.

Application filed January 14, 1925. Serial No. 2,256.

England, have invented certain new and useful ln'iprovements in Electrical l/Velding Processes, of which the following is a specification.

This invention relates to electric welding 0 IHOCBSSQS and comprises means whereby the flanged or tubular mouthed end of a hol- Zlow tubular metal member may be convcniently and advantageously welded to any other metal member provided with a hole or 5 aperture therein to receive the end of the aforesaid tubular member.

The invention particularly applicable to the manufacture of metal wheels of the cordingly be described with reference to the construction of such wheels.

In the manufacture of such wheels I prefer to employ spokes which are bellinouthed or provided with an outwardly extending flange at one extremity and pass the same through suitably shaped holes or apertures in the wheel rim so that such flanges or bell-n1outhed extremities fit snugl against those portions of the rim surroun ing the said apertures. The end of the spoke may be passed through the aperture in the wheel rim prior to being flanged or it more convenient the ed e of the aperture may be bent downwar ly to provide an opening of sutlicient size to allow the bellmouthed or flanged end of the spoke to be passed therethrough. If this latter method is employed then the edge of the aperture will be bent upwardly, after the insertion of the end of the spoke, to engage beneath the bell-mouthed or flanged portion of the spoke.

According to this invention I provide an annular electrode to encircle one of the aid spokes at a point immediately adjacent o the point where welding to the rim is esired. The other electrode is preferably haped to conform to the inner shape and ize oi the outer extremity of the spoke and he aperture in the rim through which it )asses. Either one or both electrodes may 2 movably mounted so that pressure may 9 readily exerted on the portions of metal type in which a tubular metal spoke is o welded. to the rim or telloe and it will 9.0-

to be welded together during the welding operation. i

The annular electrode may be formed in two or more portions suitably connected" to each other or to any convenient part of the Weldin machine to enable it'to be at tached to tie spoke and removed therefrom before and after the operation of welding.

In order that the said invention may be clearly understood and readil carried into effect the same. will now be escribed with reference to the accompanying drawings, in which v Fig. l is a sectional view of the rim and spoke with electrodes applied according to my invention.

Fig. 2 shows in plan a tubular spoke with an annular electrode applied thereto.

annular electrode having its separate parts hinged.

Fig. lshows a section of a rim and a section of a tubular spoke passing throu h it.

Fig. 5 shows a modification in whic the tubular spoke is applied to the outside of the rim.

Referring to Figs. 1, 2, 3 and 4 of the drawin a tubular bell-mouthed spoke 1 is fitted within an a erture in a rim 2 in the position in whici it is desired to be welded, or as shown in Fig. 5 is fitted on the outside of the flange formed around such aperture. An annular electrode 3 is placed around the extremity of the tubular spoke adjacent to the part to be welded. The annular electrode is constructed in two parts, one part 3" being fixed to the welding machine and the other part 3 being movable as shown in. Fig. 2 and provided with suitable known means for clamping the same in position.

One method of constructing the annular electrode is shown in Fig. 3 in which a fixed part 3 is attached to the welding machine and a movahlepart 3 is attached to the part 3 by means of a hinge 4 at one end, the two portions being held securely.

Fig. 8 shows a similar view to Fig. 2, the

in figs. 1 and 4. in 5 the electrode S is applied to that portion of the rim'2- which overlaps themouth of the spoke 1.

Although the invention has been described and illustrated as applied to the construction of Wheels I do not limit it to such construction as it is obvious that it may be apolicd with equal convenience and advantage to any article of motel in which a tubular member is desired to be welded .to any other member provided with an aperture for the pr. pose of receivin and providing seating for the extremity or such tubular member.

Though I have described within-rent particularity and detail certain embodiments in my inventiom yet it is not to be understood that the invention is restricted to the llili'tltflllil' embodiments disclosed. Various modifications may be made by those skilled the art Without departure from the inntion as defined in the tollowing claims.

Whit l claim. is

1. Tee method of electrically vveldiug tidinlar metal member to another metal member having an aperture therein which consists in forming a flange around the applied thereto by electrodes, the electrodes aperture in the last mentioned member and fianging the end of the tubular metal mem- 1 her, then bringing the flanges together, and connecting by means of an electric current applied thereto by electrodes.

2. The method of electrically Welding 1 tubular metal member to ,another metal member having an aperture therein which consists in forming a flange around the 3 aperture in the last mentioned member and fianging the end of the tubular metal memher, then bringing the flanges together, and connecting by means of an electric current 40 being shaped to fit the flanged portions of the two members.

.3. An electrode for welding 21 flanged tubular metal member to another metal member formed of sections adapted to fit around the tubular member and shaped to conform to the shape of the members adjecent'the welding point.

In witness whereof, I have hereunto signed my name.

JOHN THOMAS TURNEY RANDLES. 

